Scarfing-machine.



No. 857,682. PATENTED JUNE 25, 1907.

. c. F. STAOKPOLE.

SGARFING MACHINE.

' APPLIUATION FILED FEB. 16. 1904.

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No. 857.682. v PATENTED UNE 25, 1.907.]

' 0. F. STAGKPOLE. SGARFING MACHINE.

APPLIUA TIQN FILED IEB. 15, 1904.

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Witnesses t Inventor I flay.

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UNITED STATES PATENT OFFICE.

ASSIGNMENTS, TO THE TURNER TANNING MACHINERY COMPANY, OF

BOSTON, MASSACHUSETTS, A CORPORATION OF MAINE.

SSCARFlNC-Iv-IVIACHINE.

Specification of Letters .iT-atent Patented June 25, 1907.

Application filed February 15, 1904:. Serial No. 193,532.

To aZZ whom, it may concern.-

Be it known that I, CHARLEs F. STACK- POLE, a citizen of the UnitedStates, residing clination, and whereby the cut may be made so as toleave a thin edge, without tearing the leather, with the least possibleamount of scarfing by hand, and without waste of material.

The invention is particularly applicable to a machine employing anendless band or belt knife and provision is made for attaching theinvention to and detaching it from said machine so thatthe machinewithout the invention applied thereto may be used as a splitting machinein the usual manner, and with the attachment thereon may be used forscarfing purposes.

In accordance with this invention, provision is made for automaticallycontrolling the movement of the gage roll toward the plane in which theknife travels, so that the different pieces of leather may be cut on thesame angle and the cut may be made of substan tially the same length,irrespective of variations, within limits, in the thickness of thepieces of leather acted upon. Provision is also made for varying theangle and the length of the cut as desired. For this purpose, I employ agage which is movable with relation to the gage roll, and-make provisionfor automatically stopping the said gage when it reaches the limit ofits travel in opposite directions. These and other features of thisinvention will be pointed out in the claim at the end of thisspecification.

Figure 1 is a front elevation of a belt knife splitting machineembodying this invention. Fig. 2, an end elevation of the machine shownin Fig. 1, looking toward the left.

Fig. 3, a detail in side elevation and on an enlarged scale to bereferred to. Fig. 4., a partial plan and section of the parts showninFig. 3. Fig. 5, a vertical section on the line 55, Figs. 3 and 4. Fig.6, a sectional detail on an enlarged scale on the line 66, Fig. 1,showing the gage roll in What may be termed its starting position. Fig.7, a sectional view like Fig. 6 showing the gage roll in theposition itoccupies when the scarf is partially cut. Fig. 8, a sectional detail onan enlarged scale, taken on the .line 8 8, Figs. 3 and 4. Fig. 9, adetail in elevation and on an enlarged scale to be referred to, and Fig.10, a

cross section on a reduced scale taken on the line 1010, Fig. 3.

In the present instance, I have shown the invention as applied to a beltknife splitting machine, which consists essentially of a bed roll 0.provided with a rubber covering b, the sectional ring roll 0.co-operating therewith, the gage roll d, the endless band or belt knifef, the wheels or pulleys h, i, supported at opposite ends of the frame7', and over which the said knife is passed, the guiding plates or jawsis between which the knife is passed and supported in close proximity tothe ring roll 0, the tables Z, m co-operating with the ring roll, theshaft n provided'with the belt pulley o and bevel pinion gin mesh withthe bevel gear 1 on the shaft 8 of the pulley h, andthe gearing t forrotating the bed roll and gage roll are and may be of any usual orsuitable construction. The gage roll (1 is movable toward and from thering roll and is supported in bearings 12 (see Fig. 5), which aresecured to a movable head or carrier, comprising metal side pieces 13,141 separated at their lower edges to leave an opening through which thegage roll may project as represented in Figs. 6 and 7. The side pieces13, 14

are secured to or form part of end pieces 15, connected by a Web orcross piece 16, and said side pieces are provided with guiding ribs 17(see Fig. 4) which extend into guide- Ways 18 in; the sides 19 of theframework of the machine. The end pieces 15 of the gage roll carrier areprovided with substantially horizontal arms 20, which project beyond thesides of the frame of the machine and between which arms and lugs 21 onsaid frame, are interposed helical springs 22, which act to lift thegage roll carrier, which may be of the said carrier. 1

The gage roll d may be held from springing under pressure byre-enforcing or backing rolls 28 (see Fig. 6), supported above and incontact with thegage roll by means of rods 29 screw-threaded at theirupper end to be engaged by nuts 30, 31, which are interposed between theweb or crossbar 16 and guide blocks or pieces 32, which are fittedbetween the sides 13, 14 of the gage roll carrier, and centered oraccurately adjusted by means of threaded plugs or centering pieces 33,which are extended through threaded holes in the sides of the saidcarrier and accessible from iihe outside of the machine, as representedin ig. 1.

The machine as thus far described is adapted to be used for splittingleather after the manner of an ordinary belt knife leather splittingmachine. i

The primary object-of the present invention, is to provide. the leathersplitting ma' chine with mechanism, which may and preferably will be inthe form of an attachment,

by means of which leather and other material and particularly leatherbelting, may be scarfed or beveled at itsends, in such manner as toenable the leather to be cut to a very thin edge without liability oftearing the leather, without waste of material, and so that the bevelsare of substantially uniform length irrespective of the thickness withinlimits of the leather, thereby enabling leather to be uniformly scarfedat a minimum cost. To this end, the machine is provided with a gage ordevice for controlling the movement of the gage roll toward the ringroll, whereby the leather is presented to the action of the knife insuch manner, that the said knife ef fects a cut of substantially uniformlength on an incline or angle predetermined by the gage or controllingdevice and irrespective of the thickness, within limits, of the leather.

The gage or controlling device is preferably adjustable, whereby it canbe moved into any desired position at an angle to the plane in which theleather is moved, so that the leather may be cut on any desired angleand the scarf made of any desired length within limits.

Provision is made for moving the gage or controlling devicesimultaneously with the leather as the latter is fed out of the machine,and provision is also made for automatically returning the gage'to itsstarting position.

In the present instance, I have shown one form of gage or controllingdevice, which may be made as herein shown (see Fi 3) and consists of alever or. arm 40 secure to a carrier, herein shown as a rack bar 41movable in a substantially horizontal guideway in a frame or support 42(see Fig. 10), which is attached to the side frame of the machine as bybolts 43, the said rack bar being retained in its guide way by strips orpieces 44, 45, se-

cured to the support or frame 42 by screws 46, 47, so as to leave theside of the rack bar exposed as shown in Fig. 3.

The rack bar 41 is provided on its front or exposed side with aT-shapedslot 48 (see Fig. 10) extended longitudinally of the said bar,and within the enlarged portion of which is fitted the head of a bolt49, which is side with a longitudinally extended slot or groove 52 (seedotted lines, Fig. 3), into which extends a stud or projection 54 on theend of a spring rod or bar 55 attached to the side of the rack bar 41and as shown in Fig. 3 set into a recess 56 in said rack bar.

The rack bar and its attached gage are and may be moved in a planesubstantially at right angles to the plane in which the gage roll at ismoved bodily, by mechanism as will now be described.

Referring to Figs. 4 and 5, the bearing block 12 for the gage roll 61supports a stationary shaft or pin located above and in line with thegage roll and secured in said bearing by the screw 61. The shaft 60 hasloosely mounted on it, a gear 62 which meshes with a gear or pinion 63fastened to the shaft 64 of the gage roll d as by the key 65. Thestationary shaft 60 has loose on it between the bearing 12 and the gear62 a lever 66, and beyond the gear 62 a roller 67, and beyond the roller67 the hub 68 of a lever 69, which parts are retained on said shaft by anut 70. The roller 67 is adapted to engage the upper surface of the gage40 and is provided as shown with an elongated hub which is adapted tobear against the hub of the gear 62. The levers 66, 69 support a shaft71 upon which is loosely mounted a gear 72 which meshes with and isdriven by the gear 62. The gear 72 has mounted on its hub a second gear73, which is adapted to be engaged with the rack bar 41 to producetravel thereof in one direction, which may be termed the forwarddirection indicated by the arrow 74 in Fig. 3, which direction is thesame as that in which the leather is fed out of the machine when theleather is being cut, as represented in Fig. 7. The gear 73 meshes witha gear 75 loose on a shaft 76 supported by levers 77, 78, which aremounted on the intermediate shaft 71. The gear 75 is normally held outof engagement with the rack bar 41 whilethe latter is being moved in itsforward direction, but is adapted to be engaged with said rack bar tocause the latter to be moved backward or in the direction opposite tothat indicated by the arrow 74. The gear 75 may be normally held in anelevated or non-operative position, which condition is represented inFig. 3, by a spring arm or rod 79 which is secured at one end to a sideframe 19 of the machine as by the screws 80 (see Fig. 3), and has itsfree end engaged with or connected to the lever 7 7,

and for this purpose, the spring rod 79 .may be provided with a bentfinger 81 (see Fig. 4) which is adapted to enter a suitable hole 82 inthe lever 77 (see Fig. 9).' The gear 73 may be normally held in itslowered or operative position by a helical spring 84 (see Fig. 3), whichis interposed between a lug 85 extended from the bearing 12 and an arm86 on the lever 66, the upward movement of the arm 86 being limited by astop, shown as a lug or projection 87 on the bearing 12.

Provision is made for automatically disengaging the gear 73 from therack bar 41 when the latter has completed or substantially completed itsforward movement in the direction indicated by the arrow 74, whichmovement of the rack bar is completed when the leather has been fed outof the machine and the knife has finished its cut. The automaticdisengagement of the gear 73 from the rack bar is effected by a cam orprojection 90 on the slide plate or bar (see Fig. 3) engaging aprojection or boss 91 on the underside of the lever 69, the cam 90causing the lever 69 to be turned upward on the shaft 60 as a pivot andlifting the gear 73 out of engagement with the rack bar 41. The cam 90and boss 91 are of such size as to turn the lever 69 a suflicientdistance to prevent reengagement of the gear 73 with the rack bar 41 bythe spring 84, when the operator relieves the pressure on the handle 23,which he does when the cut or scarf is finished and the gage roll ismoved into its elevated positionto permit an uncut piece of leather tobe inserted into the machine between the gage roll and the ring roll.When the gear 73 is disengaged from the rack bar 41, by the engagementof the cam 90 with the lever 69, the operator may continue to hold thehandle 23 down, if he so desires, in which case 1 the gage rollcontinues to be driven but does not move the rack bar owing to thedisengagement of the gear 73. To reverse the motion of the rack'bar, andthereby bring the gage back into its starting position, the operatorreleases the handle 23 and allows the springs 22 to lift the gage rollcarrier upward into its elevated position, which upward movement may belimited by engagement of the bearing 12 with the frame of the machine.

The gage roll carrier on its upward movement carries with it the bearing12, the shaft 60 and the levers 66, 69 mounted thereon, the shaft 71carried by said levers, and the ends of the levers 77, 78 mounted on theshaft 71. The upward movement of the lever 77 is resisted by the springarm or'rod 79, so that at or about the time, the gage roll carrier hasreached the limit of its upward movement, the lever 77 is turned on theflu er or projection 81 as a pivot and its free en is lowered so as toengage the gear with the rack bar, which is driven or moved by the gear75 in a direction opposite to that indicated by the arrow 74. The rackbar is moved backward by the gear 75 until it reaches substantially itsstarting position, whereupon, the gear 75 is automatically disengagedfrom the rack bar and thelatter stopped in its starting position, whichmay be effected as herein shown, by a stud or projection on the bar 55(see Figs. 5 and 9), which engages .the inclined end 96 of a lever 97pivoted at 98 to the frame 42 carrying the rack bar, the said leverengaging a nose or projection 99 on the lever 77. On the forwardmovement of the rack bar, the stud or projection 95 is carried out. ofengagement with the lever 97, and the said lever is turned on its pivotby the nose 99 on the lever'77 so as to elevate the inclined orcam-shaped end 96 of the lever 97 into the path of movement of the stud95, when the lever 77 is turned so as to engage the gear 75 with therack bar as above described. As a result, the inclined end 96 of thelever 97 is thus brought into position to be engaged by the stud 95 onthe backward movement of the rack bar, the said stud forcing the frontend of the lever down into the position shown in Fig. 3 and causing therear end of said lever to elevate the lever 77 and disengage the gear 75from the rack bar, the lever 77 being-held in its elevated position bythe spring arm or rod 79. The rack bar and its attached gage arearrested in their backward movement by a stop-, herein shown as a lever100 (see Fig. 3) which is adapted to be engaged by a lug or projection101 on the gage 40.

The stop lever 100 is adjusta'bly secured to the frame 42 by a bolt 102having its head fitted to slide in a T-shaped slot 103 in said frame andthe plate 44, and the said lever is secured in its adjusted position bythe nut 104. The lever 100 is provided with an arm 105 extended up overthe frame 42 and carrying an adjustingscrew 106, which engages the uppersurface of said frame and is en1- ployed to turn the said lever on itspivot 102 and raise or lower the front end of the lever 100 withrelation to the lug or projection 101 on the gage, to thereby properlyposition the stop lever with relation to said lug or projection. Thestop lever is adjustable on the frame 42 to permit the gage to beadjusted I the machine, that is, between the elevated gage roll and thering roll, until the end of the 7 minimum thickness.

on the rack bar according to the length of cut desired. As representedinFig. 3, the gage is set for a substantially short cut of a given angleor bevel, the length of out being represented in Fig. 3 by the distancefrom the center of the projection 54 to the center of the bolt 49. If itis desired to make a longer cut, the stop lever 100 is first movedtoward the right (viewing Fig. 3), after which the nut 51 is loosenedsufficiently to permit the plate 50 to be moved toward the right untilthe distance between the center of the bolt 49 and the center of the pinor projection 54 equals the length it is desired the cut should be,whereupon the nut 51 is set up to fasten the slide 50 to the rack bar41. When the gage has been adjusted on its carrier, which, in thepresent instance, is the rack bar 41, the stop lever is adjusted toengage the lug or projection 1G1 and secured to the frame 42 in itsadjusted position.

The horizontal or back table m has secured to its upper surface as byone or more bolts 1 10, (see Fig. 6) a back stop herein shown as a bar 112, which is adjustably secured to said table and positioned withrelation to the gage roll according to the length of the scarf or cut itis desired to make. i

The operation of the machine herein shown may be briefly described asfollows :-Assume the machine in the position represented by full linesin Fig. 2, namely, with the gage roll in its elevated position and thehandle 23 in its full line position, "and the gage 40 at rest in theposition represented in Fig.

The operator places a piece of leather, such,

for mstance, as a piece of leather belting, in

piece of leather strikes the back stop or work gage 112. The lever orhandle 23 .is then moved downward as indicated by dotted lines Fig. 2,which movement brings the gage roll into contact with the upper surfaceof the leather and grips the same between it and the ring roll. 1f theleather is of substantially the same thickness as the distance betweenthe gage roll and ring roll, when the roller 67 is brought intoengagement with the gage 40, as represented in Fig. 3, which thicknessmay be regarded as the minimum thickness, the knife fcommences to cut onan incline extending from the under surface of the leather to the uppersurface at the end or edge of the same. If however, the leather issomewhat thicker than the'minimum, the knife makes a deeper initial cut,which eX- tends into the leather until the thickness of the uncutleather is substantially the minimum, after which the knife cuts on thesame bevel or angle it does when the leather is of When the gage roll isbrought down into engagement with the leather, the latter is fed out ofthe machine by the gage roll and ring roll, the same as is done in theordinary construction of belt knife splitting machines. As the leatheris fed out of the machine against the cutting edge of the knife, whichmovement of the leather is in the direction indicated by arrow 74:,Figs. 3, 6 and 7, the inclined gage 40 and its carrier or rack bar aremoved in the same direction, and the movement of the gage roll towardthe ring roll or support for the leather, while the leather is beingcut, is automatically controlled by the gage 40, with the result thatthe angle or bevel of the cut is maintained clear to the edge of theleather, and the latter is firmly gripped between and held by the gageroll and ring roll even to the edge of the leather, while under theaction of the knife, with the result, that the scarf or cut may becarried to a very thin edge without danger of tearing the leather. Themovement of the gage 40 coincident with the feed of the leather out ofthe machine, is effected as above described, by the gear 73 meshing withthe rack bar. When the material has been cut or scarfed and fed out ofthe machine, the cam disengages the gear 73 from the rack bar and theoperator relieves the pressure on thehandle 23, which allows the springs22 to move the head cf the mahine carrying the gage roll, upward intoits starting position. At or about the time the movable head of themachine has reached the limit of its upward movement, the reversing gear75 is engaged with the rack bar, and the latter and its attachedinclined gage 40 is moved back into its starting position, namely, withthe lug or projection 101 in engagement with the back stop 100, the gear75 being disengaged from the rack bar by the lever 97 acted upon by thestud 95, at or about the time the rack bar reaches'it starting position.This operation is repeated as long as it is desired to cut scarfs of thesame len th and angle or bevel.

l Vhen, however it is desired, to cut a longer scarf, the gage 40 isadjusted on its carrier as above described.

It will be observed that the thick and thin pieces of material areprovided. with a cut of substantially the same length and angle orincline, thereby avoiding waste of material. It is also to be observedthat the initial cut is a little deeper in the thicker material, whichmay require a very slight amount of hand labor to finish the scarf orcut on the thicker pieces. In. practice, the gage 40 is set tocorrespond to the minimum thickness of material. It will be understood,that in practice, the pieces of leather or material to be scarfed, aresorted so as to be as nearly uniform in thickness as is practicable.

. vice movable with said rack bar to actuate is capable of being used asa splitting machine, by merely loosening the gage 40 and permitting itto hang down on its ivot, or by removing said gage from the mac inc, andwhile I may prefer to apply the invention to a splitting machine, I donot desire to limit.

fhreaded plugs 33 which are adjustable in threaded holes in said sidepieces.

Claim.

' 1. In a machine of the class described, in combination, a bed roll, aring roll co-operating therewith, a gage roll movable toward and fromsaid ring roll, an endless band or belt knife adapted to cut thematerial as it is fed from between the said gage roll and said ringroll, means to move said'knife, an inclined gage arm or bar, a rack barto which said gage arm is secured, a frame in which said rack bar issupported, a driving gear to move said rack bar in one direction, ashaft upon which said gear is mounted, levers to support said shaft,gearing to connect said driving gear with the gage roll, a second gearto reverse the motion of said rack bar, a shaft on whlch said reversinggear is mounted, levers pivoted upon the shaft ofthe said driving gearand in which the shaft of the re versing gear is supported, a cammovable with the rack bar to disengage the driving gear from said rackbar, a lever to disengage the reversing gear from sald rack bar, adesaid disengaging lever, a sprlng rod or arm to hold the reversing gearin its disengaged position, and a stop to limit the reverse movement ofsaid rack bar, substantially as described.

2. In a machine of the class described, in combination, a rotatablesupport for the ma terial to be cut, a rotatable gage roll co-operatingwith said. support and movable toward and from the same, a movable knifeto cut the material fed from between said support and gage roll, aninclined gage bar or arm to control the movement of said gage rolltoward said support, a carrier for said gage bar or arm, means to drivesaid carrier in one direction in a plane substantially at right anglesto the plane in which said gage roll is moved, means to move saidcarrier in a reverse direction, means to disengage said drivingmechanism from said carrier, means to disengage said reversing mechanismfrom said carrier, and a stop to arrest the carrier in its movement inthe reverse direction, substantially as described.

3. In a machine of the class described, in combination, a bodily movablegage roll, a

support for the material located below said 'gage roll, and a knife tocut the material, an

inclined gage controlling the bodily movement of the gage roll towardsaid support according to the cut made in said material by said knife,and mechanism to move said gage in a path substantially at right anglesto the path in which the gage roll is moved,

substantially as described.

4. In a machine of the class described, in

combination, a rotatable gage roll to engage the material, means toeffect bodily movement of said gage roll, a knife to cut said material,a gage to control the bodily movement of the gage roll toward saidknife, and mechanism driven from said gage roll to effect movement ofsaid gage in a path at an angle to the path in which the gage roll ismoved bodily, substantially as described.

5. In a machine of the class described, in combination, a rotatable bedroll, a ring roll co-operating therewith, a rotatable gage roll locatedabove and movable toward and from said ring roll, means to move saidgage roll cording to the cut in the material made by the said knife,power operated mechanism to move said gage in opposite directions, andmeans to automatically reverse the movement of said gage when it hasreached substantially the end of its movement in opposite directions,substantially as described.

6. In a machine of the class described, in combination, a bed roll, aring roll co-operating therewith, a gage roll movable toward and fromsaid ring roll, an endless knife arranged substantially on a level withsaidring roll and engaging the under side of the material interposedbetween said gage roll and said ring roll, means to move said knife, aninclined gage to control the movement of said gage roll toward said ringroll, a carrier for said gage, means to drive said carrier in onedirection in a plane substantially at right angles to the plane in whichsaid gage roll is moved, means to move said carrier in a reversedirection, means to disengage said driving mechanism from said carrier,and means to disengage said reversing mechanism from said carrier,substantially as described.

'7. In a machine of the class described, in combination, a knife to cutthe material, devices between which the material is gripped while beingcut by said knife, means to effect bodily movement of one of saiddevices toward the other, and a gage interposed in the path of movementof said bodily movable device to limit its movement toward the other ofsaid devices according to the cut made by the knife, substantially asdescribed.

8. In a machine of the class described, in combination, a reciprocatinggage, a rack bar to which said gage is attached, and mechanism toreciprocate said rack bar, said mechanism comprising agear to move saidrack bar in one direction, a second gear to move said rack bar in theopposite direction, means to rotate said gears, and means toautomatically effect engagement of said gears alternately with said rackbar substantially at the end of the movement of said gage in oppositedirections, substantially as described.

9. In a machine of the class described, a rack bar provided with alongitudinally extended slot or guideway, a bolt movable in saidguideway, an inclined gage bar or arm mounted on said bolt, means toclamp said inclined gage arm to said rack bar to move therewith, andmeans to move said rack bar, substantially as described.

10. In a machine of the class described, in combination, an inclinedgage, a movable carrier to which said gage is secured, mechanism to movesaid carrier in a substantially horizontal path, means to automaticallydisengage said mechanism from said carrier when the latter reachessubstantially the end of its movement in one direction, mechanism tomove said carrier in a reverse direction, and means to automaticallydisengage said reversing mechanism from said carrier when the latterreaches substantially the end of its movement in the reverse direction,substantially as described.

11.. In a machine of the class described, in combination, a gage bodilymovable in a substantially. horizontal path, mechanism for moving saidgage in said path, and means attached to said gage for rendering saidmechanism inoperative when the gage has reached substantially the end ofits movement in one direction, substantially as described.

12. In a machine of the class described, in combination, a gage bodilymovable in a substantially horizontal path, mechanism for moving saidgage in said path, and means movable with said gage for rendering saidmechanism. inoperative when the gage has reached substantially the endof its movement in one direction, mechanism for moving said gage in areverse direction, and means movable with said gage for rendering saidreversing mechanism inoperative when the gage has reached substantiallythe end of its movement in the reverse direction, substantially asdescribed.

1.3. In a machine of the class described, in combination, a gage rollmovable in a substantially vertical path means to move said gage roll, agage movable in a substantially horizontal path and controlling themovement of the gage roll in one direction in said vertical path, andmechanism for moving said gage in said. horizontal path, substantiallyas described.

14. In a machine of the class described, in combination, a gage rollmovable in a substantially vertical path means to move said gage roll, agage movable in a substantially horizontal path and opposing themovement oi the gage roll in one direction in said vertical path, andmechanism actuated by said. gage roll for moving said gage in saidhorizontal path, substantially as described.

15. In a machine ofthe class described, in combination a gage rollmovable in a substantially vertical path, means to move said. gage rollin said vertical path, a gage movable in a substantially horizontal pathand opposing the movement of the gage roll in one direction in saidvertical path, mechanism for moving said gage in opposite directions insaid horizontal path, and means to render said mechanism inoperative tomove said gage when the latter reaches substantially the end of itsmovement in opposite directions, substantially as described.

16. In a machine of the class described, in combination, a bed roll, aring roll co-operating therewith, a gage roll movable toward and fromsaid ring, roll, a movable endless knife adapted to cut the material asit is fed from between said gage roll means to move said knife and ringroll, and a gage movable in a direction substantially at right angles tothat in which the gage roll is moved to regulate the movement of thesaid gage roll toward. said ring roll according to the cut made by theknife in said material, substantially as described.

In testimony whereof, I have signed my name to this specification in thepresence of two subscribing witnesses.

CHARLES F, STACKPOLE.

Witnesses JAS. H. CHURoI-IILL, J. MURPHY.

